????:1????????????:??????

2???????

3??????

4???????

5?????

?1??????????21?? (? ???????)????????A????????????21????????(???????????)???????????????????,??????????????????????????????,???

????,?????????????3.89%?????3.26%,??A??????,??20%???,??????????????????????????????????????????9%?

???????????????????,?????“1+N”????????????????????????????????????“1+N”?,??100??????,??

???,?:???????,????????;?,??????;??????????????????????????????,???????

?,?,?????2.16%??????????;????????????,?????????10%?

????????????????,???,????3242?????????,??0.05%;????10305???????????,??????0.48%;???????2112?,????????0.36%?(?????) ?????????:???